A conviction, plea of guilty, plea of nolo contendere or forfeiture of bond for the violation of any of the laws of this state, or of the United States, on or after March 28, 1956, relating to alcoholic liquor shall constitute prior offense for the purpose of any prosecution, or for the purpose of imposition of sentence for any subsequent violation of this chapter.
(S.C. Code § 61-13-4220) (‘88 Code, § 14.101.3)